code: def test_custom_output_path(self):
      with tempfile.TemporaryDirectory() as tmpdirname:
          onnx_model_paths = generate_onnx_representation(
              self.model_name_or_path, output_path=tmpdirname
          )
          self.assertEqual(
              os.path.dirname(onnx_model_paths[0]), tmpdirname
          )
          self.assertEqual(len(os.listdir(tmpdirname)), 3)
  
file_path: fastT5/tests/models_test.py
imports: import os
  import tempfile
  import unittest
  from transformers import AutoTokenizer
  from fastT5 import export_and_get_onnx_model, generate_onnx_representation
label_desc: Use image node_id 3 for calling the TestFastT5 obj's underlying member method code with example usage: obj.test_custom_output_path() without return types